MAINT: regex char class improve

* replace superfluous single-character regex character
classes with their literal string equivalents; this
avoids the overhead associated with a character class
when there's only a single character enclosed (so there's
no benefit to the class overhead)

* for more information see:
Chapter 6 of:
Friedl, Jeffrey. Mastering Regular Expressions. 3rd ed.,
O’Reilly Media, 2009.

2 files changed, 7 insertions, 7 deletions

diff --git a/numpy/f2py/crackfortran.py b/numpy/f2py/crackfortran.py
index ab15bc09b..3d4dffde9 100755
--- a/numpy/f2py/crackfortran.py
+++ b/numpy/f2py/crackfortran.py
@@ -294,10 +294,10 @@ def getextension(name):
         return ''
     return name[i + 1:]
 
-is_f_file = re.compile(r'.*[.](for|ftn|f77|f)\Z', re.I).match
-_has_f_header = re.compile(r'-[*]-\s*fortran\s*-[*]-', re.I).search
-_has_f90_header = re.compile(r'-[*]-\s*f90\s*-[*]-', re.I).search
-_has_fix_header = re.compile(r'-[*]-\s*fix\s*-[*]-', re.I).search
+is_f_file = re.compile(r'.*\.(for|ftn|f77|f)\Z', re.I).match
+_has_f_header = re.compile(r'-\*-\s*fortran\s*-\*-', re.I).search
+_has_f90_header = re.compile(r'-\*-\s*f90\s*-\*-', re.I).search
+_has_fix_header = re.compile(r'-\*-\s*fix\s*-\*-', re.I).search
 _free_f90_start = re.compile(r'[^c*]\s*[^\s\d\t]', re.I).match
 
 
@@ -1482,7 +1482,7 @@ def cracktypespec0(typespec, ll):
         ll = ll[i + 2:]
     return typespec, selector, attr, ll
 #####
-namepattern = re.compile(r'\s*(?P<name>\b[\w]+\b)\s*(?P<after>.*)\s*\Z', re.I)
+namepattern = re.compile(r'\s*(?P<name>\b\w+\b)\s*(?P<after>.*)\s*\Z', re.I)
 kindselector = re.compile(
     r'\s*(\(\s*(kind\s*=)?\s*(?P<kind>.*)\s*\)|[*]\s*(?P<kind2>.*?))\s*\Z', re.I)
 charselector = re.compile(
diff --git a/numpy/f2py/f2py2e.py b/numpy/f2py/f2py2e.py
index b45d985aa..1b922ea90 100755
--- a/numpy/f2py/f2py2e.py
+++ b/numpy/f2py/f2py2e.py
@@ -511,7 +511,7 @@ def run_compile():
         remove_build_dir = 1
         build_dir = tempfile.mkdtemp()
 
-    _reg1 = re.compile(r'[-][-]link[-]')
+    _reg1 = re.compile(r'--link-')
     sysinfo_flags = [_m for _m in sys.argv[1:] if _reg1.match(_m)]
     sys.argv = [_m for _m in sys.argv if _m not in sysinfo_flags]
     if sysinfo_flags:
@@ -569,7 +569,7 @@ def run_compile():
             del flib_flags[i]
         assert len(flib_flags) <= 2, repr(flib_flags)
 
-    _reg5 = re.compile(r'[-][-](verbose)')
+    _reg5 = re.compile(r'--(verbose)')
     setup_flags = [_m for _m in sys.argv[1:] if _reg5.match(_m)]
     sys.argv = [_m for _m in sys.argv if _m not in setup_flags]